Dishwasher



Dec. 26, 1922. 1,439,823.

H. A. KAUFMANN.

DISHWASHER.

FILED Nov. 22,`192o. 2 SHEETS-SHEET 1.

Dec. 26, 1922.

H. A. KAUFMANN.

DISHWASHER.

FILED Nov. 22. 1920.

2 SHEETS-SHEET 2.

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UNITED STATES p- A 1,439,823 PATENT OFFICE.

IIARRYA. KAUFMANN, or KANSAS CITY, MISSOURI, AssIGNoR-.To HENRIETTA-s. KAUFMANN, oFMINNEAroLIs, MINNESOTA.

lDISIIWASIIER.v Y

`Application-filed November 22, 1920. SerialNo. 425,759.

To a-ZZ whom t may concern l Be it known that I, HARRY A. KAUF- y MANN, a citizen of the United States, residing at Kansas City, in the county of Jackson and `State of Missouri, have invented certain new and useful Improvements in Dishwashers; and I do declare the follow-` ing to be a full, clear, and exact description of the invention, such as will enablel others skilled in the artto which it appertains to make and use the same, reference being had to the .accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to dish washing machines and the primary object. thereof is to provide a, dish` washing machine so constructed that the cleansing liquid or suds will be distributed about the container and over the dish racks above the normal level of the cleansingliquid so that the foreign matter will be eliiciently removed from the dishes and gravitate to the bottom of the receptacle.

There is va material advantage in arrangingthe dish racks above the normal level of the cleansing fluid because if the racks are submerged, the solid particles will adhere to the dishes and it will be impossible to rinse them properly. By providing the racks above the normal water level and providing a distributor, the cleansing fluid can 'be thrown over the dishes by the distributor in a manner-to remove the foreign matter therefrom and in this way, the dishes will be automatically drained, leaving them free from extraneous matter, as will be apparent by reference to the following description andas the nature of the invention is better understood.

It is the purpose'of my invention to pro-l vide means whereby the dishes may be not only efficiently cleanedl but whereby they may bel dried quickly and to this end I prefer to direct air, preferably heated, over the dishes to evaporate the moisture therefrom. The air may be directed 'centrally through the bottom of the receptacle, from which point it may be distributed over the dishes. An air column may also be employed for agitating the cleansinguid within the receptacle; that is, an incoming column of air can be directed centrally through the liquid column or body so that it will be agiuid horizontally or substantially .,s'o, pref# 60 y.

er'ably in radial stream lines, againstl the` sidesof the racks and against the dishes containedtherein. I j After the dishes are washed, thelwater- -l can be drained therefrom andthe air intro-i615- f duced to quickly dry them, as will be clearly apparent by referencel to the following description taken in connection with the ac'- companying drawings, 1n which Fig. 1 is a perspective view of a-'dish170`.

washing machine constructed in accordance with my inventlon.

F ig. 2 is a vertical, longitudinal, sectional j view 4through the same.

Fig. 3 is a detail perspective view ofthe 75 A' distributor. i

, Fig'. 4 is a sectional view through the air conduit, showing an automatic circuit breaker movable in response to air pressure,

and

Fig. 5 is a sectional view through a part of the distributor, showing the manner of connectingv it to the post which supports it.

In the illustrated embodiment of my in` vention I have shown a container, receptacle or tank 1,'which is preferably circular and provided with la conica-l bottom 2, havinga valved outlet 3 and an open inlet 4, the inlet communicating with a conduit 5, connected to an air impeller or pump 6, the impeller element of which is adapted to be driven any suitable means as, for example, an electric motori'.

The impeller casing 8 is provided with av neck or tubular portion 9 through an opening 10 in the wall of the receptacle 1 and said tubular portionis adapted. to receive a threaded washer or nut All on the insideof the receptacle 1 whereby the casing 8 will be rigidly attached to the re- 100 ceptacle l. The tubular portion 9 consti- .tutes an inlet for the impeller casing 8, the

outletcommunicating `with the tube 5 to. direct a column of air through the inletopening '4 of the receptacle l. l

'A bracket 12 carried by the bottom of the receptacle `1 supports a tubular standard 13, i i' adapted to receive a, post 14, extending in axialalignment with the conical bottom 2,

, projecting the end ofthe post being `provided with a 110 knob or ball 1 5, whichfits in a pressed-in recess 16 on a distributor disk 17 The distributor disk is concavo-convex, preferably in the shape of a cone and has a plurality of faces 18, against which theair or water or both may be directed so that the fluid directed against the under or convex side of the distributor will be deflected in substantially horizontal lines against the dishes in the dish rack or racks.

The under side of the disk 17 carries a washer or guard 19, which fits about the head 15 loosely so that the disk 17 may have a wobbling, rotative movement about the post 14, the general motion of the deflector or distributor being indicated in dotted lines in Fig. 3.

The receptacle 1 carries one or more dish racks, there being two shown in the drawings and designated 20 and 21, the former "preferably being for dishes and the latter for glassware. The dish racks may be conveniently supported within the receptacle in any well known manner. The lower dish rack 2O preferably has handles 22 and 23 which may be extended, as shown in Fig. l, to hold the rack 20 supported upon the top 24 of the receptacle 1 so that the dishes may be conveniently accessible or for pe-r mitting the rack to be supported while the dishes are being placed therein. l

Above the dish racks is a conical deflector 25, which is secured to the top or cover 26Y by brackets or straps 27 and 28, the cover 26 being hinged at 29 to the top 24, as clearly seen in Fig. 2.

The delector 25 is for the purpose of directing cleansing water or suds which may splash above the rack 21 back into the receptacle and for the purpose of preventing the cleansing liquid being discharged through the top or into the exhauster space 30 between the deflector and the cover 26.

There is a central, conical opening 31 in the center of the delector 25, which permits air to be exhausted from the receptacle into chamber 30, into the inlet or the exhauster casing 8 and back into the inlet 4 of the receptacle. There is also a blow-ofi valve 32 in the cover 26, which may be operated when the pressure within the receptacle 1v reaches a determined degree as it may, due to steam being generated by the heater 33 carried by the conical portion of the receptacle 1 and normally below the liquid level in the container.

The heater is provided with a contact bracket 34 on the outside of the receptacle 1, adapted to receive an electric plug connection 35 from a conductor 36, receiving its power from a suitable source connbcted to the conductor cord 37 which carries not only the conductor cable 36 but a cable 38, connected to the fan motor 7. The conductor wires 39 and 40 for the conductor cable 36 terminate in two contacts 41 and 42, extending within the vertical leg of the conduit 5 and beneath the contacts 41 and 42 is an automatic circuitv closer, illustrated as a disk 43, pivoted within the conduit at 44 and carrying a counter-weight 0r bar 45 which constitutes la contact bar for bridging the gap between contacts 41 and 42. Therefore, when the current is turned on and the fan is Set in motion, the air pressure will swing the disk or damper 43 out of obstructing p0- sition, causing the bar 45 to bridge the contacts 41 and 42 and effecting a series connection between the conductor Wire 39, contacts 41 and 42 and the heat element 33, the conductor wire 40 being the return conductor as will be well understood.

The heating element may be a ring of copper tubing, in which the heating element may be positioned, the ring being sealed against action of the water in which it is submerged.

Therefore, when the current is turned on,

the impeller fan will operate, causing the and conduit 5 and through the inlet 4, causing the cleansing liquid to be agitated sufliciently to force a column of water up against the deflector or distributor disk 17. The polygonal faces 18 of the disk will receive the column of water in such a manner that there will be a tendency to tilt the disk so that it will wobble about itsv axis, throwing a somewhat irregular spray or volume of water against the dishes in substantially horizontal, radial lines, the water being directed against the dishes with sucient force to remove objectionable matter carried thereby and as the water flows over the ing the solid particles to gravitatev to the bottom of the receptacle 1, from which point they may pass out through the discharge 3 when the operator presses upon the peddle 46 of the lever 47, fulcrumed at 48 to one of the standards 49, it being understood that the opposite end of the lever is connected to the spring-retained valve stem 50.

The standards 49 arepreferably received in tubular sockets or members 51, which are supported by the receptacle and its top 24, the standards being vertically adjustable and when adjusted, they are adapted to be held in proper position by the set screws 52, it being understood that the standards 49 can be telescoped in 51 to facilitate shipping as'well as to permit the receptacle to be raised and lowered for the purpose of convenience or for leveling the device.

` 'Thevtop 24 also preferably carries hinged leaves or shelves 53 and 54, which are adapted to be held in horizontal positions on the .top 24 to constitute a part of a table to hold ldishes or the like. These leaves, however,

lfma'y be dispensed with if desired.

It will be apparent from the foregoing that y when the parts are properly assembled with the dishes in their rack and thecleansing liquid below Athe rack so that the dishes will l not be submerged, the motor can bevoper-v .tamed therein to remove-- iated so that a current of air or air and liquid will be driven against the defiector of distributor disk 17, which Will direct the liquid over the dish racks and the dishes conobjectionable matter. i

After. the device has' operated a suiicient length of time to effect the proper cleansing of the dishes, the foot lever 46 can be operated to drain off the cleansing. water, it being'. generally desirable to first shut down the motor, and after the liquid has been drained of, the motor can again be started up so that a dry blast of air will be directed into the receptacle t'o evaporate any moisture therein and thereby dry the dishes, it being understood that when the water is drained off, the air will'pass oven the heater 33 to be heated preparatory to contacting with the dishes.

In actual practice I have found that ardevice constructed in accordance with my invention is eci'ent and easily operated.

What I claim and desire to secure by Let-l ters-Patent is:

1. Al dish washer comprising a liquid container, a dish rack within the container above .the noraml liquid level therein, means for directing :the liquid centrally and upwardly from the lower portion of the container, and a rotative, wobbling liquid distributor above the normal level of the liquid for directing the liquid toward the wall of the container.

2. A dish washer comprising a liquid container, a dish rack within the container above the normal Iliquid level therein, means for directing a column of air through the liquid i liquid defiect'or between the first named deiiector and the bottom of the container, the axis of which is in line with the axis of the container, and means for actuating the impeller. l

In testimon whereof I aix my signature.

a{IARRY A. KAUFMANN. 

